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quick q. on cam end play

 
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squeeezer
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Joined: 02 Mar 2007
Posts: 2427
Location: new richmond WI
191524.76 points


1991 Chevrolet Camaro

PostPosted: Tue Mar 30, 2010 4:24 am    Post subject: quick q. on cam end play Reply with quote

if .005 is good endplay #

then why do the factory roller cams (w/ thrust plate) have soooo damn much end play??????

i did not measure the original end play but it had to be over .030

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clay
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Joined: 24 Nov 2002
Posts: 3209
Location: South Carolina
318129.23 points


1972 Chevrolet Nova

PostPosted: Tue Mar 30, 2010 10:29 am    Post subject: Reply with quote

I don't really know but here's my opinion. Short answer is it's cheaper. With more endplay specified there is almost no chance that tolerance stackup in the machining process can result in it not being able to be assembled. Tolerances can be opened up to probably + or - 0.005" on everything in that area instead of something like + or - 0.001" or less if they speced 0.005" endplay. With most stuff going to basically crank triggered ignition and coil packs, timing isn't affected by cam float. Spring pressures are fairly low so excessive wear isn't really an issue evidently. Basically it's just good enough to do what the factory intends. Clay
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squeeezer
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Joined: 02 Mar 2007
Posts: 2427
Location: new richmond WI
191524.76 points


1991 Chevrolet Camaro

PostPosted: Tue Mar 30, 2010 8:55 pm    Post subject: Reply with quote

and i was thinking more of the distributor cars
and the gas mileage it may waste if much at all
sbc with a dizzy in the 90's didnt get too good of mileage did they
i guess i get the cost effectiveness
i was wondering what the diff would be .005 to lets say .010
cam walk to lets say 6500 to 7k motor???

im stricktly wondering about cam to distributor phasing???

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af2
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Joined: 01 Sep 2003
Posts: 5558
Location: grassvalley, ca
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1933 Willys Coupe

PostPosted: Tue Mar 30, 2010 10:43 pm    Post subject: Reply with quote

squeeezer wrote:

im stricktly wondering about cam to distributor phasing???


.005 and .010 will make no difference. Go with .010 so you have no chance smashing the bearing.
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